<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>

</head>
<body>
<div id="app">
  {{content}}
</div>

</body>
<script src="../static/vue.js"></script>
<script>
  // var dom = document.getElementById('app');
  // dom.innerHTML='hello world';
  var app = new Vue({
    el: '#app',
    data: {
      content: 'hello world'
    }
  })
  setTimeout(function () {
    app.content='by world';
  }, 2000);
</script>
</html>
